Timberlake, Alan, author
Cambridge University Press, 2004
Buku Teks
Beloshapkova, Vera Arsen`yevna, author
Prosveshhenie, 1967
Buku Referensi
Potapova, Nina F., author
Foreign Languages Publishing House, 1959
Buku Teks
Krylova, Ol`ga Alekseyevna, author
Russkij Yazyk, 1976
Buku Teks
Iyevleva, Zinaida Nikolayevna, author
Russkij Yazyk, 1981
Buku Teks